Valve



U, 1935. R. W. LEACH El AL 1,999,592

VALVE Filed March 14, 1932 2 Shets-Sheet l fizz/anions Kobe??? 16/ m 5illzlamefi enr 'yzaieman/ April] 39, 1935. R. w. LEACH ET AL VALVE 2Sheets-Shee t 2 Filed March 14, 1932 .ww F

[ml/anion: ioZerZ William [each William Wen 3 Z zez'r dilorn 4 ,BaiemaavPatented Apr. 30, 1935 llllobert William teach and William Henry Bataan,Newport, England implication March it, M32, i i No. 598,706 lln GreatBritain may 9, 1931 c era-rm. y (en. ctr-cc) This invention relates tovalves of the kind ing face of the disc showing a modified form of inwhich one side of a rotary disc co-operates the lubricant groove. with acomplementary seating in the body part Figure 5 is an elevation of thevalve disc showfor controlling a passage in the body'situated at ing adiflerent modification of the lubricant it one side of the axis ofrotation of the disc. In groove. 6 such valves the working face of thedisc or of In carrying the invention into efiect as shown; the seatingis formed with an annular channel the rotary disc at is held against itsseating in the into which lubricant is supplied under pressure body b bya spring 0. Rotation of the disc about from a lubricant storage chamber.As is well its central axis is effected by any convenient 39 known thereis a tendency in valves of this kind means such as a pinion d in thebody part enw for the disc to stick to the seating, even when gaging atoothed ring e in the disc. The toothed the working faces are adequatelylubricated, and ring in the example shown subtends rather more use ismade of the lubricating fluid to release the than one half of the faceof the disc. At one side disc prior to its movements from one positionto of the disc adjacent to the periphery is arranged another. When thefluid passages or passages in the body part the reservoir f from which35 are not symmetrically disposed about all diamelubricant can be forcedunder pressure to the ters of the disc, the centre of pressure of theworking face of the disc. The fluid passages gin fluid acting on oneface of the disc does not cointhe body part are situated at one side ofthe cide with its centre of revolution. Hitherto the axis of the discand the latter is formed with an grooves which are supplied withlubricant under aperture h which can be moved into coincidence pressureto urge the disc from its seat have been with or away from the passage.symmetrically disposed about the axis of revolu- Lubricant isdistributed around the working tion of the disc, and consequently whenpressure faces of the disc a and seating by one or more is exerted onthe disc by the lubricant to release annular grooves i in the disc.Previously these the disc from its seating, the eil'ect of the lubrihavebeen made of uniform width, but according cant pressure is ordinarily totilt the disc about to the present invention the lubricant groove, orthe part of the disc periphery remote from the one or each of thegrooves, is shaped so that its openings in the disc. The object of thepresent width gradually increases from a minimum at invention is toobviate this tilt in a simple and one point to a. maximum at adiametrically opconvenient manner. posite point, or, as shown in thedrawings, one

The invention comprises the arrangement or of the grooves is uniformlynarrow around the shaping and positioning of the lubricant groove partadjacent to the aperture h and is uniformly or grooves in the face ofthe disc or seating so wide around the other part. A greater area isthat the axial thrust exerted on the disc by the thus presented to thesaid working surfaces at lubricant in the grooves has its centre ofpresthe part adjacent to the position at which the sure sufficientlycoincident with the centre of fluid pressure is concentrated on thedisc. A1- pressure of the fluid acting upon the opposite ternatively anannular groove or grooves of uniside of the disc, that the disc may movefrom its form width may be used in combination with one seatinguniformly at all parts, when it is reor more short radial grooves 1- asshown in Figquired to release the disc from its seating by the ure 4.The localized increase in lifting efiort lubricant pressure. may also beobtained in a variety of other ways,

Pressure variations in the lubricating grooves as for example, by meansof one or more localized due to the reluctance of highly viscous mediumsenlargements in the groove. to flow tend to alter the centre of pressureof the The variations in the areas exposed to lubrithrust exerted by thelubricant, but the disadvancant pressure are such that when the valve istages arising from this condition can also be pressed ofi its seating bythe lubricant, the presovercome by this invention. sure exerted by thelubricant obviates the set- In the accompanying drawings, Figure 1 is ating up of a. tilting action. Consequently the sectional elevation of avalve constructed in acvalve can be separated from its seatinguniformly, cordance with this invention. whether the valve is open orclosed.

Figure 2 is an elevation showing the working The invention is notlimited to the example face of the valve disc. above described assubordinate details can be Figure 3. is an elevation showing a portionof the varied to suit different requirements. Thus the fixed seatingwith which the disc co-operates. groove or grooves i may be arranged inthe seat- Figure 4 is an elevation of a portion of the working surfaceinstead of the disc. Or the grooves i 5 can be dispensed with, in whichcase the groove containing the toothed ring e is made to extend aroundthe entire face of the valve, as shown in Fig. 5, and has lubricantsupplied to it. This groove is then made suitably wider at one part It,than in the other parts thereof, or is provided at suitable parts withappropriate enlargements or branches. Also we desire it to be understoodthat the term lubricant is intended to include viscous substancesemployed for making a seal or fluid tight contact between the disc andits seating. It will be noted that in all of the modifications shown,the lubricant groove in one of the working faces presents a larger areato the other working face at the side of the axis of the disc oppositefrom that of the aperture through the disc.

In the valve illustrated two annular grooves i are shown, one of themonly being formed with a portion of increased width. If desired both maybe made of increased width around a portion of its length. The twogrooves are joined by cross grooves p. Lubricant is supplied to theinner groove 1' from the chamber 1 by a passage q. Also lubricantgrooves s, t, are formed in the central portion of the disc to lubricatethe face of thatportion and of the spindle u. Access of lubricant from ito s is afforded by transverse grooves 1) formed in a transverse portion:1: of the fixed seating of the valve body as shown in Figure 3. Whenthe disc a. is in the closed position, the ends of the grooves 12overlap short radial grooves w opening into the inner groove 2' as shownby dotted lines in Figure 2, and so allow lubricant to pass from i to s.When the disc is rotated to the open position, the grooves to pass awayfrom the grooves v, and interrupt the communication between the grooves2' and s. If the grooves 12 were formed in the face of the disc theywould be exposed when the disc is rotated to the open position andlubricant would escape. This undesirable condition is avoided by theconstruction shown.

Lubricant is charged into the chamber f in any convenient manner, as forexample through the hollow spindle y of the pinion d, the lubricantpassing from the spindle along a passage z. The open end of the spindleis closed by a screwed plug 2, and escape of lubricant from the plugwhen the plug is removed is prevented by a nonreturn valve 3.

The part 4 on the spindle is a pinion by which a pinion 5 carrying anindicator 6 is rotated with the spindle, the indicator serving to showwhether the valve is open or closed.

Having thus described our invention what we claim as new and desire tosecure by Letters Patent is:--

1. In a valve, a rotary disc having an aperture at one side of its axis,a seating complementary to said disc and having a passage adapted tocoincide with said aperture at one rotational position of said disc,said disc and seating having working faces, and an endless annularlubricant groove in one of said faces, said groove presenting alargerarea to the other of said faces at one side of the axis of said discthan at the other side of said axis.

2. In a valve, a rotary disc having an aperture at one side of its axis,a seating complementary to said disc and having a passage adapted tocoincide with said aperture at one rotational position of said disc,said disc and seating having working faces, and an endless annularlubricant groove in one of said faces extending coextensively with theperiphery of the disc, said groove presenting a larger area to the otherof said faces at the side of the axis of said disc opposite from that ofsaid aperture.

3. In a valve, a rotary disc having an aperture at one side of its axis,a seating complementary to said disc and having a passage adapted tocoincide with said aperture at one rotational position of said disc,said disc and seating having working faces, and an annular lubricantgroove in one of said faces, said groove being wider at one side of theaxis of the disc than at the other side of the axis. V

4. In a valve, a rotary disc having an aperture at one side of its axis,a seating complementary to said disc and having a passage adapted tocoincide with said aperture at one rotational position of said disc,said disc and seating having working faces, and an annular lubricantgroove in one of said faces, said groove having an enlargement in aportion thereof located at one side only,of the axis of the disc.

5. In a valve, a rotary disc having an aperture at one side of. itsaxis, a seating complementary to said disc and having a passage adaptedto comcide with said aperture at one rotational position of said disc,said disc and seating having working faces, an annular lubricant groovein one of said faces near the periphery of said disc, said groove havinga wider portion located at the side only of the axis of the discopposite to that in which the aperture is located, an annular groove insaid same face near the center of said disc, and transverse grooves inone of said faces communicating between said annular grooves.

6. In a valve, a rotary disc having an aperture at one side of its axis,a seating complementary to said disc and having a passage adapted tocoincide with said aperture at one rotational position of said disc,said disc and seating having working faces, an endless annular lubricantgroove in one of said faces, the groove being so positioned that itextend co-extensively with the periphery of the disc and is constantlyclosed at one side during both open and closed positions of the disc byconstant contact with the working face of the seating, said groove beingso shaped that lubricant forced into it exerts a thrust greater on theside of the axis of the disc where the passage is not located than onthat side of the disc wherein the passage is located.

ROBERT WILLIAM LEACH. WILLIAM HENRY BATEMAN.

